Leon aubin



WLFUUS. PHOTO-LITHOGRAPMER. WASHINGTON. D (L UNITED STATES PATENT OFFICEc N. AUBIN, OF MONTREAL, CANADA.

IMPROVEMENT IN PEAT-MACHINES.

Specification forming part of Letters Patent No. 98,333, dated December 28, 1869.

u To all whom it may concern.'

Be it known that l, AIME NrcHoLAs NAPO- LEON AUBIN, formerly of Albany, county of Albany, State of New York, temporarily residing in Montreal, Dominion of Canada, have invented certain Improvements in Peat-Machines, of which the following is a specification:

The nature of my invention is confined to a modiication in the form of the knives and to the addition of a pocket in a machine for which I obtained a patent on the 27th October, 1868, in order to enable said machine to throw off stones or other hard bodies, which in some localities are found'mixed with the peat and interfere with the working of that otherwise successful and ecient device. I shall therefore conne myself to the description of the altered construction of the knives and ofthe side pocket for the purpose stated.

Figure l is a side view of the machine. Fig. 2 is an interior end view of it with the front removed. Fig. 3 isa side view of the revolving knives with a cross-section of the cutting and grinding knives. Fig. 4 is a side view, showing the relative position of the fixed and revolving knives.

A A, outside shell; B B, panels which open 'to examine, clean, or repair the machine; b, handle to the same; C, shaft bearing the revolving drum c and driving-pulley c; D, box or hopper through which the crude peat is introduced by means of shovels, rakes, or an elevator; d, spout through which the ground peat is expelled; E, side pocket opened in the lower portion of the shell in the relative position to the motion of the revolving drum, as indicated by thearrow e. e1 is the hinged vcover of the pocket; e2, handle to open it.; F,

side view of the revolving knives f1, cuttingknife; f2, grinding-knife; G, fixed knife; g1, ange by which it is bolted to the lower part of the shell; h h, stone being thrown 0E by the combinedaction and shape of the fixed and revolving knives; h', stone which has been Apushed by the revolving knives from the in- 'substances only and to merely press forward any hard body. rlhe forward edge of the fixed knives being straight and nearly perpendicular to the circumference of the drum, the substances which are not thrown o' by the curved fixed knives are pushed between -the latter and exposed to the grinding action of the corrugated sides of the revolving knives.

Ilhe new construction of the fixed knives, which cover nearly one-half of the interior circumference of the machine, affords a larger grinding-surface between their sides and the corrugated revolving knives. This adds much to the efficiency of the machine, as it is found that peat compresses itself in drying, and ac-v quires a density nearly proportioned to the degree of grinding and puddling to which it has been submitted. By placing the spout or opening for the escape of the ground peatat the upper part of the machine, instead of below, as it was before, the peat is also longer exposed to the action of the knives, and its more perfect grinding is thus secured.

What I claim as my invention is- The side pocket E at a tangent ofthe curve, described by the end of the ixed knives G, and the fixed knives G, in combination with the revolving knives F, the whole constructed and operating substantially and for the purpose hereinafter set forth.

N. AUBIN. Witnesses:

GEO. A. MATILE,

CEAS. H. KELLEs. 

